Bonacasa's family says the 31-year-old entered the Air Force immediately after graduating from Newfield High School in 2002. He was on his fourth tour of duty when he died. He also served in Iraq and Kuwait.

Bonacasa grew up in Coram in a tight-knit family. He was married at 20 years old and had a daughter named Lily, who turned 5 a few days ago.

On Monday, officials confirmed that NYPD Detective Joseph Lemm was also among the Americans killed in the attack. Bonacasa's family says the two were roommates in Afghanistan.

Bonacasa and Lemm were both based out of the 105th Air Wing at Stewart Air National Guard Base in Newburgh, Orange County.